IB/srp: Fix infinite loop when FMR sg[0].offset != 0

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commit 681cc36083 upstream.

Avoid that mapping an sg-list in which the first element has a
non-zero offset triggers an infinite loop when using FMR. This
patch makes the FMR mapping code similar to that of ib_sg_to_pages().

Note: older Mellanox HCAs do not support non-zero offsets for FMR.
See also commit 8c4037b501 ("IB/srp: always avoid non-zero offsets
into an FMR").

Reported-by: Alex Estrin <alex.estrin@intel.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Bart Van Assche 2016-09-26 12:58:49 -07:00 • committed by Ben Hutchings

parent 3c54629c64

commit 00a05de9ae

1 changed files with 5 additions and 3 deletions

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drivers/infiniband/ulp/srp/ib_srp.c

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